to my horror, i discovered a shredded crisps bag and chewing gum wrapper in the the boot of my car. my initial thoughts were that it may have been a spider as these often live behind the electric outside mirrors and spin their webs overnight to trap their prey. but then i discovered that there were some rodent droppings as well on the boot mat.after cleaning the boot out,i decided to look under the boot floor mat where i discovered to my horror ,some more droppings and a partly eaten/shredded cloth toolkit wrapper. how did it get in?did it creep up from below and are there any channels for this to happen? i looked under the rear seat and there no invasion in there ,so i was relieved somewhat. the boot floor is at least 2 feet off the ground-so how did it get in.? is it still living in the boot ? should i use rat poison?/mouse nipper(trap) overnight in the boot?